Feed-water heater



(No Model.)

J. H. ELWARD.

FEED WATER HEATER.

No. 276,373. Patented Apr. 24, 1883.

N. PE ERSPhoIQLiQhogfi-lpher. Washing-m. D. C-

' in the county of Ogle cured to the boiler,

UNITED STATES PATENT OFFICE.

JOHN H. EDWARD, or PoLo, 1LLrNoIs.

FEED-WATER H EATE R.

SPECIFICATION forming part of Letters Patent No. 276,373, dated April 24, 1883.

' Applicationfiled October 20, 1882. (No model.)

To all whom it may concern:

Be it known that I, JOHN H. ELWARD, a citizen of the United States, residing at Polo, and State of Illinois, have invented certain new and useful Improvements in Feed-Water Heaters, of which the following is a specification, reference being bad therein to the accompanying drawings.

Figure 1 is a side elevation of a portion of an engine adapted to have my improvements applied thereto. Fig. 2 is a front end view without the supporting devices. Fig. 3 is a perspective of the front water jacket or vessel detached. Fig. 4 is a longitudinal section of the front part of the engine.

My invention is especially applicable to the traction or portable engines which are transported from one place to another, and are employed for thrashing and other farm purposes. The ground-wheels of the boiler proper, the engine, the furnace, and the driving mechanism may be of any desired construction.

in the drawings, A represents the outer shell of the boiler, extending from the rear end to the front end parts or plates, B B. Within the boiler is situated the main fireflue G, extending from the rear to the front end.

0 is a circular plate or diaphragm near the front end, riveted or bolted to the outer shell of the boiler. 'At this plate the fire-flue proper terminates, and in it are supported the returning-flues which carry the products of combustion back to the smoke-stack. Between this plate and the forward end there is a smokechamber,() Thelower chamber is formed with parts permanently sethe upper part. consisting of a removable device to be hereinafter explained.

As shown, theouter shell of the boiler extends as a cylinder to the rear end, and through the lower part of the front portion a doorway is provided, furnished with a .door, P", by means of which the cinders and ashes that may gather in the front smoke-chamber may be removed, they passing therefrom into a receptacle, P, below.

B is a plate inclosing the lower part of the smoke-chamberand permanently fastened to the boiler-shell.

O is a large door in the front end, adapted to portion of this smokepermit free access to the front part of the main fire-flue when it is necessary to clean it,

or in any way repair any of the adjacent parts. This door has an aperture covered by a small supplemental door, by means of which access can be had to the front smoke-chamber or to the fire-flue at times when it is not desirable to make an opening as large as would be made by opening the door 0.

Above the permanent part of the front smoke-chamber above described I secure the chamber or receptacle adapted to contain water, the object of which is to prevent the destructionof the metal upon which the hot air. 6 from the furnace impinges on its way to the return-flues, and to utilize thishea't in raising the temperature of the water after it leaves the feed-water heater proper (if the latter be employed) and before it enters the boiler. 7r This receptacle or vessel is formed of the on ter plate, B, situated above the permanent plate B, the inner plate, G, the circumferential plate G, and the under plate, G

Iam aware that heretofore water receptacles or vessels have been arranged at the front ends of boilers in such manner as to receive the impact of the currents of the products of combustion and utilize the heat withdrawn therefrom in heating the water before passing it to the boilers; but the constructions of this character with which I am acquainted have been in many respects inferior to the one which I have devised and shown. As heretofore constructed, they have consisted of chambers extended entirely around the cylindrical space at the end of the boiler, and therefore have seriously interfered with the proper collecting and manipulating of the cinders and refuse material, which, as is well known, gather in large quantities at this point in a boiler of this class. Moreover, as heretofore made, the inner plate has been joined to the circumferential plate in such manner as to produce a chamber triangular in cross-section. I provide a 5 much larger water-vessel within a comparatively small smoke-chamber by the employment of an additional plate, as shown at Gr,situated substantially parallel to the outer plate, B,

the inner or under plate, G in my construc- Ico tion terminating at points immediately outside of the series of fire-fines. By arranging the a erases.

devices thus, an unbroken passage is provided for the products of combustion, and at the same time a larger part of the space in the smoke-chamber is made available.

gg are stay-bolts by means of which the inner or under plate is strengthenet'l and prevented from collapsing, and which at the same time may be utilized in fastening the whole water- 'vessel in place, for they may be extended upward, so as to be adapted to pass through the outer shell of the boiler and there clamped in position by means of nuts or other devices.

Preferably the water jacket or vesssel thus constructed is made detachable, so that it can be removed for cleaning outthe engine and for makingany necessary repairs; but some of the features of my improved jacket and heater can berctained, though it be made permanent. When removable it is supported within the smoke-chamber by means of straps and bolts, as shown at G, and cross-ties, as shown at G.

M is a pipe running from the ordinary feedwater heater (where the water is partially heated by the exhaust-steam) to the interior of the jacket or vessel above described, and M is another pipe connecting said jacket or vessel with the interior of the boiler, these pipes being provided with stop-cocks or cutoffs of any suitable character to regulate the flow of water, or to entirely out it off if the jacket or vessel be removable and it is desired to remove the same. At H there is a handhole and plate for permitting access to the interior of the water-jacket.

What I claim is-- 1. In a portable engine, the combination, with the fire-flue and the return-fines, of the smoke-chamber O at the front end, having an escape-orifice in the bottom thereof for cinders and ashes, and the water jacket or vessel situated in the upper part of said chamber, substantially as set forth.

2. In a portable engine, the combination, with the main fire-flue and the return-fines, of the front smoke-chamber, having its lower part formed by the outer shell of the boiler, and the rear permanent plate, B, and the waterjacket or vessel having the inner plate, G, extending downward in proximity to the front wall of the boiler proper, the outer plate, B, the circumferential plate G, and the under plate, G arranged substantially as set forth, to form an unbroken passage for the products of combustion from the fire-flue to the return- Hues.

3. In a portable engine, the combination, with the main tire-flue and the return-fines, of the front smoke-chamber, O and the water jacket or vessel situated therein, and composed of the outer plate, B, the inner plate,

G, the-circumferential plate G, the under plate, G and the stay-bolts for supporting said inner plate, substantially'as set forth.

4. In a'portable engine, the combination, with the main fire-flue and the return-fiues, of

a detachable and removable water-jacket, B,

constructed-and arranged substantially as set forth, to receive from the furnace the heated currents and deflect them from the return-fines, as described.

In testimony whereof I affix my signature in presence of two witnesses.

- JOHN H. ELWARD. Witnesses: 1

H. H.;BLISS', M. P. OALLAN. 

